fix load error

changelog.txt

@@ -1,4 +1,9 @@
 ---------------------------------------------------------------------------------------------------
+Version: 0.1.4
+Date: 2021-01-22
+  Fixes: 
+    - Attempt to fix a load error by failing gracefully
+---------------------------------------------------------------------------------------------------
 Version: 0.1.3
 Date: 2021-01-19
   Changes: 

info.json

@@ -1,6 +1,6 @@
 {
     "name": "bzlead",
-    "version": "0.1.3",
+    "version": "0.1.4",
     "factorio_version": "1.1",
     "title": "Lead",
     "author": "Brevven",

util.lua

@@ -33,10 +33,12 @@ end
 
 -- Add a given quantity of ingredient to a given recipe
 function util.add_ingredient(recipe_name, ingredient, quantity)
+  if data.raw.recipe[recipe_name] then
     add_ingredient(data.raw.recipe[recipe_name], ingredient, quantity)
     add_ingredient(data.raw.recipe[recipe_name].normal, ingredient, quantity)
     add_ingredient(data.raw.recipe[recipe_name].expensive, ingredient, quantity)
   end
+end
 
 function add_ingredient(recipe, ingredient, quantity)
   if recipe ~= nil and recipe.ingredients ~= nil then
@@ -44,12 +46,14 @@ function add_ingredient(recipe, ingredient, quantity)
   end
 end
 
--- Replace one ingredien with another in a recipe
+-- Replace one ingredient with another in a recipe
 function util.replace_ingredient(recipe_name, old, new)
+  if data.raw.recipe[recipe_name] then
     replace_ingredient(data.raw.recipe[recipe_name], old, new)
     replace_ingredient(data.raw.recipe[recipe_name].normal, old, new)
     replace_ingredient(data.raw.recipe[recipe_name].expensive, old, new)
   end
+end
 
 function replace_ingredient(recipe, old, new)
 	if recipe ~= nil and recipe.ingredients ~= nil then
@@ -64,10 +68,12 @@ end
 
 -- Remove an ingredient from a recipe
 function util.remove_ingredient(recipe_name, old)
+  if data.raw.recipe[recipe_name] then
     remove_ingredient(data.raw.recipe[recipe_name], old)
     remove_ingredient(data.raw.recipe[recipe_name].normal, old)
     remove_ingredient(data.raw.recipe[recipe_name].expensive, old)
   end
+end
 
 function remove_ingredient(recipe, old)
   index = -1
@@ -87,10 +93,12 @@ end
 
 -- Replace an amount of an ingredient in a recipe. Keep at least 1 of old.
 function util.replace_some_ingredient(recipe_name, old, new, amount)
+  if data.raw.recipe[recipe_name] then
     replace_some_ingredient(data.raw.recipe[recipe_name], old, new, amount)
     replace_some_ingredient(data.raw.recipe[recipe_name].normal, old, new, amount)
     replace_some_ingredient(data.raw.recipe[recipe_name].expensive, old, new, amount)
   end
+end
 
 function replace_some_ingredient(recipe, old, new, amount)
 	if recipe ~= nil and recipe.ingredients ~= nil then